LITMUS RED, Indicator paper

Litmus Red Indicator Paper is used for the rapid and tentative determination of pH in laboratory solutions. It provides a simple visual means of determining whether a solution is acid or alkaline.
The indicator paper changes its color when it comes in contact with a test solution depending on the chemical nature of the test solution. The observed color can be compared with the appropriate reference to provide an approximate indication of pH. This makes litmus paper useful for quick checks before more precise measurements are made with a calibrated pH meter.
The indicator paper is especially helpful in the routine work of the laboratory when a rapid determination of the pH of a solution is desired. It can be useful for detecting unanticipated changes in acidity or alkalinity during sample prep and other lab procedures.
The product is designed for pH estimation and not for exact pH measurement. Where precise pH values are required, a pH meter should be used with the appropriate standard buffer system. Its assay specification is predicated on color termination by pH allowing for reliable visual interpretation while testing.
The product has a red paper appearance and passes the specified sensitivity test, demonstrating the expected red-to-blue colour change under suitable alkaline conditions.

Provides a quick visual check of acidity or alkalinity by changing from red to blue in alkaline solutions.